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avcodec/jpegtables: Unavpriv MJPEG-tables

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There are seven MJPEG-tables, five small (1x12, 4x17) and two
not small (2x162). These are all avpriv, despite this not being
worthwhile due to the overhead of exporting a symbol: The total
overhead for each symbol consists of two entries in .dynsym (24B each),
one entry in the importing library's .rela.dyn (24B) and one in .got
(8B) as well as 2x2B for symbol versions and 4B for symbol hashes
in the exporting library; in addition to that, the name of the symbol
is included in both exporting and importing libraries, using 2x210 bytes
in this case.
(The above numbers are for a x64 Elf/Linux/GNU system. Other platforms
will give different numbers.)

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2021-02-10 01:19:44 +01:00
parent 3afb41655e
commit 1d333c1547
17 changed files with 203 additions and 152 deletions
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16
libavformat/rtpdec_jpeg.c
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@@ -144,14 +144,14 @@ static int jpeg_create_header(uint8_t *buf, int size, uint32_t type, uint32_t w,
bytestream2_put_be16(&pbc, 0);
dht_size = 2;
dht_size += jpeg_create_huffman_table(&pbc, 0, 0,avpriv_mjpeg_bits_dc_luminance,
avpriv_mjpeg_val_dc);
dht_size += jpeg_create_huffman_table(&pbc, 0, 1, avpriv_mjpeg_bits_dc_chrominance,
avpriv_mjpeg_val_dc);
dht_size += jpeg_create_huffman_table(&pbc, 1, 0, avpriv_mjpeg_bits_ac_luminance,
avpriv_mjpeg_val_ac_luminance);
dht_size += jpeg_create_huffman_table(&pbc, 1, 1, avpriv_mjpeg_bits_ac_chrominance,
avpriv_mjpeg_val_ac_chrominance);
dht_size += jpeg_create_huffman_table(&pbc, 0, 0,ff_mjpeg_bits_dc_luminance,
ff_mjpeg_val_dc);
dht_size += jpeg_create_huffman_table(&pbc, 0, 1, ff_mjpeg_bits_dc_chrominance,
ff_mjpeg_val_dc);
dht_size += jpeg_create_huffman_table(&pbc, 1, 0, ff_mjpeg_bits_ac_luminance,
ff_mjpeg_val_ac_luminance);
dht_size += jpeg_create_huffman_table(&pbc, 1, 1, ff_mjpeg_bits_ac_chrominance,
ff_mjpeg_val_ac_chrominance);
AV_WB16(dht_size_ptr, dht_size);
/* SOF0 */